Quick answers
- Does Ocean N. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Ocean N. Nguyen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Ocean N. Nguyen see?
- In 2024, CMS data shows 144 Original Medicare patients and 375 services for Ocean N. Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Ocean N. Nguyen's NPI number?
- 1851931430. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Ocean N. Nguyen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 144 |
|---|---|
| Services billed to Medicare | 375 |
| Different services or procedures | 31 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Most frequent services
- Detection test by immunoassay technique for influenza virus (87400)56 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)56 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)38 services
- Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus (87426)34 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)32 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol66%
- High blood pressure62%
- Arthritis37%
- Anxiety33%
- Depression26%
- Chronic kidney disease22%
Hospitals where Ocean N. Nguyen works
Medicare's Facility Affiliation Data lists Ocean N. Nguyen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Lowell General HospitalLowell, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220063
Practice locations
Addresses where Ocean N. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 20 Commercial Rd, Suite 2Leominster, MA 01453 (978) 798‑6896
- 256 Washington St, Unit 2Hudson, MA 01749 (978) 293‑5026
- 345 Main StTewksbury, MA 01876 (978) 851‑4683
- 484 Route 134South Dennis, MA 02660 (508) 694‑7901
- 58 Bedford StLexington, MA 02420 (781) 538‑4526
Group practices
Medicare enrollment lists Ocean N. Nguyen as a member of these groups (CMS data updated October 2, 2026).
- Convenientmd - FFS UC LLC392 clinicians in the group
- Carewell Urgent Care Centers of Ma, PC46 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Leominster
Clinicians with the same Medicare primary specialty in Leominster, MA — not a recommendation.
Other clinicians in Convenientmd - FFS UC LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2020 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851931430 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians